Khanyi is from the South African Zulu khanyi — from ukukhanya (to shine, light). Khanyi is one of the South African Zulu feminine names. role in Happiness Is a Four-Letter Word (2016) + Red Ink + The Wife.
Khanyi does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Khanyi reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.